![Thomas Gleixner](/assets/img/avatar_default.png)
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: "David S. Miller" <davem@davemloft.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Jaroslav Kysela <perex@suse.cz> Cc: Takashi Iwai <tiwai@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2217 lines
57 KiB
C
2217 lines
57 KiB
C
/*
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* au1000.c -- Sound driver for Alchemy Au1000 MIPS Internet Edge
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* Processor.
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*
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* Copyright 2001 MontaVista Software Inc.
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* Author: MontaVista Software, Inc.
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* stevel@mvista.com or source@mvista.com
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*
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* Module command line parameters:
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*
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* Supported devices:
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* /dev/dsp standard OSS /dev/dsp device
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* /dev/mixer standard OSS /dev/mixer device
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*
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* Notes:
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*
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* 1. Much of the OSS buffer allocation, ioctl's, and mmap'ing are
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* taken, slightly modified or not at all, from the ES1371 driver,
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* so refer to the credits in es1371.c for those. The rest of the
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* code (probe, open, read, write, the ISR, etc.) is new.
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*
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* Revision history
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* 06.27.2001 Initial version
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* 03.20.2002 Added mutex locks around read/write methods, to prevent
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* simultaneous access on SMP or preemptible kernels. Also
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* removed the counter/pointer fragment aligning at the end
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* of read/write methods [stevel].
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* 03.21.2002 Add support for coherent DMA on the audio read/write DMA
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* channels [stevel].
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*
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*/
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#include <linux/module.h>
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#include <linux/string.h>
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#include <linux/ioport.h>
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#include <linux/sched.h>
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#include <linux/delay.h>
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#include <linux/sound.h>
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#include <linux/slab.h>
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#include <linux/soundcard.h>
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#include <linux/init.h>
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#include <linux/page-flags.h>
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#include <linux/poll.h>
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#include <linux/pci.h>
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#include <linux/bitops.h>
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#include <linux/proc_fs.h>
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#include <linux/spinlock.h>
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#include <linux/smp_lock.h>
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#include <linux/ac97_codec.h>
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#include <linux/interrupt.h>
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#include <linux/mutex.h>
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#include <asm/io.h>
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#include <asm/uaccess.h>
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#include <asm/mach-au1x00/au1000.h>
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#include <asm/mach-au1x00/au1000_dma.h>
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/* --------------------------------------------------------------------- */
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#undef OSS_DOCUMENTED_MIXER_SEMANTICS
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#undef AU1000_DEBUG
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#undef AU1000_VERBOSE_DEBUG
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#define AU1000_MODULE_NAME "Au1000 audio"
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#define PFX AU1000_MODULE_NAME
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#ifdef AU1000_DEBUG
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#define dbg(format, arg...) printk(KERN_DEBUG PFX ": " format "\n" , ## arg)
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#else
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#define dbg(format, arg...) do {} while (0)
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#endif
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#define err(format, arg...) printk(KERN_ERR PFX ": " format "\n" , ## arg)
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#define info(format, arg...) printk(KERN_INFO PFX ": " format "\n" , ## arg)
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#define warn(format, arg...) printk(KERN_WARNING PFX ": " format "\n" , ## arg)
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/* misc stuff */
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#define POLL_COUNT 0x5000
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#define AC97_EXT_DACS (AC97_EXTID_SDAC | AC97_EXTID_CDAC | AC97_EXTID_LDAC)
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/* Boot options */
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static int vra = 0; // 0 = no VRA, 1 = use VRA if codec supports it
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module_param(vra, bool, 0);
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MODULE_PARM_DESC(vra, "if 1 use VRA if codec supports it");
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/* --------------------------------------------------------------------- */
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struct au1000_state {
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/* soundcore stuff */
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int dev_audio;
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#ifdef AU1000_DEBUG
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/* debug /proc entry */
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struct proc_dir_entry *ps;
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struct proc_dir_entry *ac97_ps;
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#endif /* AU1000_DEBUG */
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struct ac97_codec codec;
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unsigned codec_base_caps;// AC'97 reg 00h, "Reset Register"
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unsigned codec_ext_caps; // AC'97 reg 28h, "Extended Audio ID"
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int no_vra; // do not use VRA
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spinlock_t lock;
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struct mutex open_mutex;
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struct mutex sem;
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mode_t open_mode;
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wait_queue_head_t open_wait;
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struct dmabuf {
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unsigned int dmanr; // DMA Channel number
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unsigned sample_rate; // Hz
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unsigned src_factor; // SRC interp/decimation (no vra)
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unsigned sample_size; // 8 or 16
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int num_channels; // 1 = mono, 2 = stereo, 4, 6
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int dma_bytes_per_sample;// DMA bytes per audio sample frame
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int user_bytes_per_sample;// User bytes per audio sample frame
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int cnt_factor; // user-to-DMA bytes per audio
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// sample frame
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void *rawbuf;
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dma_addr_t dmaaddr;
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unsigned buforder;
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unsigned numfrag; // # of DMA fragments in DMA buffer
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unsigned fragshift;
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void *nextIn; // ptr to next-in to DMA buffer
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void *nextOut;// ptr to next-out from DMA buffer
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int count; // current byte count in DMA buffer
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unsigned total_bytes; // total bytes written or read
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unsigned error; // over/underrun
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wait_queue_head_t wait;
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/* redundant, but makes calculations easier */
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unsigned fragsize; // user perception of fragment size
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unsigned dma_fragsize; // DMA (real) fragment size
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unsigned dmasize; // Total DMA buffer size
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// (mult. of DMA fragsize)
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/* OSS stuff */
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unsigned mapped:1;
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unsigned ready:1;
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unsigned stopped:1;
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unsigned ossfragshift;
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int ossmaxfrags;
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unsigned subdivision;
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} dma_dac , dma_adc;
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} au1000_state;
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/* --------------------------------------------------------------------- */
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static inline unsigned ld2(unsigned int x)
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{
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unsigned r = 0;
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if (x >= 0x10000) {
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x >>= 16;
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r += 16;
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}
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if (x >= 0x100) {
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x >>= 8;
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r += 8;
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}
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if (x >= 0x10) {
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x >>= 4;
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r += 4;
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}
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if (x >= 4) {
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x >>= 2;
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r += 2;
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}
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if (x >= 2)
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r++;
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return r;
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}
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/* --------------------------------------------------------------------- */
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static void au1000_delay(int msec)
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{
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unsigned long tmo;
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signed long tmo2;
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if (in_interrupt())
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return;
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tmo = jiffies + (msec * HZ) / 1000;
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for (;;) {
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tmo2 = tmo - jiffies;
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if (tmo2 <= 0)
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break;
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schedule_timeout(tmo2);
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}
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}
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/* --------------------------------------------------------------------- */
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static u16 rdcodec(struct ac97_codec *codec, u8 addr)
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{
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struct au1000_state *s = (struct au1000_state *)codec->private_data;
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unsigned long flags;
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u32 cmd;
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u16 data;
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int i;
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spin_lock_irqsave(&s->lock, flags);
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for (i = 0; i < POLL_COUNT; i++)
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if (!(au_readl(AC97C_STATUS) & AC97C_CP))
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break;
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if (i == POLL_COUNT)
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err("rdcodec: codec cmd pending expired!");
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cmd = (u32) addr & AC97C_INDEX_MASK;
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cmd |= AC97C_READ; // read command
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au_writel(cmd, AC97C_CMD);
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/* now wait for the data */
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for (i = 0; i < POLL_COUNT; i++)
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if (!(au_readl(AC97C_STATUS) & AC97C_CP))
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break;
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if (i == POLL_COUNT) {
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err("rdcodec: read poll expired!");
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return 0;
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}
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data = au_readl(AC97C_CMD) & 0xffff;
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spin_unlock_irqrestore(&s->lock, flags);
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return data;
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}
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static void wrcodec(struct ac97_codec *codec, u8 addr, u16 data)
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{
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struct au1000_state *s = (struct au1000_state *)codec->private_data;
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unsigned long flags;
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u32 cmd;
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int i;
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spin_lock_irqsave(&s->lock, flags);
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for (i = 0; i < POLL_COUNT; i++)
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if (!(au_readl(AC97C_STATUS) & AC97C_CP))
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break;
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if (i == POLL_COUNT)
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err("wrcodec: codec cmd pending expired!");
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cmd = (u32) addr & AC97C_INDEX_MASK;
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cmd &= ~AC97C_READ; // write command
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cmd |= ((u32) data << AC97C_WD_BIT); // OR in the data word
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au_writel(cmd, AC97C_CMD);
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spin_unlock_irqrestore(&s->lock, flags);
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}
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static void waitcodec(struct ac97_codec *codec)
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{
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u16 temp;
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int i;
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/* codec_wait is used to wait for a ready state after
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an AC97C_RESET. */
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au1000_delay(10);
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// first poll the CODEC_READY tag bit
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for (i = 0; i < POLL_COUNT; i++)
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if (au_readl(AC97C_STATUS) & AC97C_READY)
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break;
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if (i == POLL_COUNT) {
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err("waitcodec: CODEC_READY poll expired!");
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return;
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}
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// get AC'97 powerdown control/status register
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temp = rdcodec(codec, AC97_POWER_CONTROL);
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// If anything is powered down, power'em up
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if (temp & 0x7f00) {
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// Power on
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wrcodec(codec, AC97_POWER_CONTROL, 0);
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au1000_delay(100);
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// Reread
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temp = rdcodec(codec, AC97_POWER_CONTROL);
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}
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// Check if Codec REF,ANL,DAC,ADC ready
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if ((temp & 0x7f0f) != 0x000f)
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err("codec reg 26 status (0x%x) not ready!!", temp);
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}
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/* --------------------------------------------------------------------- */
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/* stop the ADC before calling */
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static void set_adc_rate(struct au1000_state *s, unsigned rate)
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{
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struct dmabuf *adc = &s->dma_adc;
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struct dmabuf *dac = &s->dma_dac;
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unsigned adc_rate, dac_rate;
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u16 ac97_extstat;
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if (s->no_vra) {
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// calc SRC factor
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adc->src_factor = ((96000 / rate) + 1) >> 1;
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adc->sample_rate = 48000 / adc->src_factor;
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return;
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}
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adc->src_factor = 1;
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ac97_extstat = rdcodec(&s->codec, AC97_EXTENDED_STATUS);
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rate = rate > 48000 ? 48000 : rate;
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// enable VRA
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wrcodec(&s->codec, AC97_EXTENDED_STATUS,
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ac97_extstat | AC97_EXTSTAT_VRA);
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// now write the sample rate
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wrcodec(&s->codec, AC97_PCM_LR_ADC_RATE, (u16) rate);
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// read it back for actual supported rate
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adc_rate = rdcodec(&s->codec, AC97_PCM_LR_ADC_RATE);
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#ifdef AU1000_VERBOSE_DEBUG
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dbg("%s: set to %d Hz", __FUNCTION__, adc_rate);
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#endif
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// some codec's don't allow unequal DAC and ADC rates, in which case
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// writing one rate reg actually changes both.
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dac_rate = rdcodec(&s->codec, AC97_PCM_FRONT_DAC_RATE);
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if (dac->num_channels > 2)
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wrcodec(&s->codec, AC97_PCM_SURR_DAC_RATE, dac_rate);
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if (dac->num_channels > 4)
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wrcodec(&s->codec, AC97_PCM_LFE_DAC_RATE, dac_rate);
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adc->sample_rate = adc_rate;
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dac->sample_rate = dac_rate;
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}
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/* stop the DAC before calling */
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static void set_dac_rate(struct au1000_state *s, unsigned rate)
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{
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struct dmabuf *dac = &s->dma_dac;
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struct dmabuf *adc = &s->dma_adc;
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unsigned adc_rate, dac_rate;
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u16 ac97_extstat;
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if (s->no_vra) {
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// calc SRC factor
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dac->src_factor = ((96000 / rate) + 1) >> 1;
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dac->sample_rate = 48000 / dac->src_factor;
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return;
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}
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dac->src_factor = 1;
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ac97_extstat = rdcodec(&s->codec, AC97_EXTENDED_STATUS);
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rate = rate > 48000 ? 48000 : rate;
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// enable VRA
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wrcodec(&s->codec, AC97_EXTENDED_STATUS,
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ac97_extstat | AC97_EXTSTAT_VRA);
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// now write the sample rate
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wrcodec(&s->codec, AC97_PCM_FRONT_DAC_RATE, (u16) rate);
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// I don't support different sample rates for multichannel,
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// so make these channels the same.
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if (dac->num_channels > 2)
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wrcodec(&s->codec, AC97_PCM_SURR_DAC_RATE, (u16) rate);
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if (dac->num_channels > 4)
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wrcodec(&s->codec, AC97_PCM_LFE_DAC_RATE, (u16) rate);
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// read it back for actual supported rate
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dac_rate = rdcodec(&s->codec, AC97_PCM_FRONT_DAC_RATE);
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#ifdef AU1000_VERBOSE_DEBUG
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dbg("%s: set to %d Hz", __FUNCTION__, dac_rate);
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#endif
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// some codec's don't allow unequal DAC and ADC rates, in which case
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// writing one rate reg actually changes both.
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adc_rate = rdcodec(&s->codec, AC97_PCM_LR_ADC_RATE);
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dac->sample_rate = dac_rate;
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adc->sample_rate = adc_rate;
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}
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static void stop_dac(struct au1000_state *s)
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{
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struct dmabuf *db = &s->dma_dac;
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unsigned long flags;
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if (db->stopped)
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return;
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spin_lock_irqsave(&s->lock, flags);
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disable_dma(db->dmanr);
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db->stopped = 1;
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spin_unlock_irqrestore(&s->lock, flags);
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}
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static void stop_adc(struct au1000_state *s)
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{
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struct dmabuf *db = &s->dma_adc;
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unsigned long flags;
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if (db->stopped)
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return;
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spin_lock_irqsave(&s->lock, flags);
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disable_dma(db->dmanr);
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db->stopped = 1;
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spin_unlock_irqrestore(&s->lock, flags);
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}
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static void set_xmit_slots(int num_channels)
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{
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u32 ac97_config = au_readl(AC97C_CONFIG) & ~AC97C_XMIT_SLOTS_MASK;
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switch (num_channels) {
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case 1: // mono
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case 2: // stereo, slots 3,4
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ac97_config |= (0x3 << AC97C_XMIT_SLOTS_BIT);
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break;
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case 4: // stereo with surround, slots 3,4,7,8
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ac97_config |= (0x33 << AC97C_XMIT_SLOTS_BIT);
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break;
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case 6: // stereo with surround and center/LFE, slots 3,4,6,7,8,9
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ac97_config |= (0x7b << AC97C_XMIT_SLOTS_BIT);
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break;
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}
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au_writel(ac97_config, AC97C_CONFIG);
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}
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static void set_recv_slots(int num_channels)
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{
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u32 ac97_config = au_readl(AC97C_CONFIG) & ~AC97C_RECV_SLOTS_MASK;
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/*
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* Always enable slots 3 and 4 (stereo). Slot 6 is
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* optional Mic ADC, which I don't support yet.
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*/
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ac97_config |= (0x3 << AC97C_RECV_SLOTS_BIT);
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au_writel(ac97_config, AC97C_CONFIG);
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}
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static void start_dac(struct au1000_state *s)
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{
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struct dmabuf *db = &s->dma_dac;
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unsigned long flags;
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unsigned long buf1, buf2;
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if (!db->stopped)
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return;
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spin_lock_irqsave(&s->lock, flags);
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au_readl(AC97C_STATUS); // read status to clear sticky bits
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// reset Buffer 1 and 2 pointers to nextOut and nextOut+dma_fragsize
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buf1 = virt_to_phys(db->nextOut);
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buf2 = buf1 + db->dma_fragsize;
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if (buf2 >= db->dmaaddr + db->dmasize)
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buf2 -= db->dmasize;
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set_xmit_slots(db->num_channels);
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init_dma(db->dmanr);
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if (get_dma_active_buffer(db->dmanr) == 0) {
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clear_dma_done0(db->dmanr); // clear DMA done bit
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set_dma_addr0(db->dmanr, buf1);
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set_dma_addr1(db->dmanr, buf2);
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} else {
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clear_dma_done1(db->dmanr); // clear DMA done bit
|
|
set_dma_addr1(db->dmanr, buf1);
|
|
set_dma_addr0(db->dmanr, buf2);
|
|
}
|
|
set_dma_count(db->dmanr, db->dma_fragsize>>1);
|
|
enable_dma_buffers(db->dmanr);
|
|
|
|
start_dma(db->dmanr);
|
|
|
|
#ifdef AU1000_VERBOSE_DEBUG
|
|
dump_au1000_dma_channel(db->dmanr);
|
|
#endif
|
|
|
|
db->stopped = 0;
|
|
|
|
spin_unlock_irqrestore(&s->lock, flags);
|
|
}
|
|
|
|
static void start_adc(struct au1000_state *s)
|
|
{
|
|
struct dmabuf *db = &s->dma_adc;
|
|
unsigned long flags;
|
|
unsigned long buf1, buf2;
|
|
|
|
if (!db->stopped)
|
|
return;
|
|
|
|
spin_lock_irqsave(&s->lock, flags);
|
|
|
|
au_readl(AC97C_STATUS); // read status to clear sticky bits
|
|
|
|
// reset Buffer 1 and 2 pointers to nextIn and nextIn+dma_fragsize
|
|
buf1 = virt_to_phys(db->nextIn);
|
|
buf2 = buf1 + db->dma_fragsize;
|
|
if (buf2 >= db->dmaaddr + db->dmasize)
|
|
buf2 -= db->dmasize;
|
|
|
|
set_recv_slots(db->num_channels);
|
|
|
|
init_dma(db->dmanr);
|
|
if (get_dma_active_buffer(db->dmanr) == 0) {
|
|
clear_dma_done0(db->dmanr); // clear DMA done bit
|
|
set_dma_addr0(db->dmanr, buf1);
|
|
set_dma_addr1(db->dmanr, buf2);
|
|
} else {
|
|
clear_dma_done1(db->dmanr); // clear DMA done bit
|
|
set_dma_addr1(db->dmanr, buf1);
|
|
set_dma_addr0(db->dmanr, buf2);
|
|
}
|
|
set_dma_count(db->dmanr, db->dma_fragsize>>1);
|
|
enable_dma_buffers(db->dmanr);
|
|
|
|
start_dma(db->dmanr);
|
|
|
|
#ifdef AU1000_VERBOSE_DEBUG
|
|
dump_au1000_dma_channel(db->dmanr);
|
|
#endif
|
|
|
|
db->stopped = 0;
|
|
|
|
spin_unlock_irqrestore(&s->lock, flags);
|
|
}
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
|
|
#define DMABUF_DEFAULTORDER (17-PAGE_SHIFT)
|
|
#define DMABUF_MINORDER 1
|
|
|
|
static inline void dealloc_dmabuf(struct au1000_state *s, struct dmabuf *db)
|
|
{
|
|
struct page *page, *pend;
|
|
|
|
if (db->rawbuf) {
|
|
/* undo marking the pages as reserved */
|
|
pend = virt_to_page(db->rawbuf +
|
|
(PAGE_SIZE << db->buforder) - 1);
|
|
for (page = virt_to_page(db->rawbuf); page <= pend; page++)
|
|
ClearPageReserved(page);
|
|
dma_free_noncoherent(NULL,
|
|
PAGE_SIZE << db->buforder,
|
|
db->rawbuf,
|
|
db->dmaaddr);
|
|
}
|
|
db->rawbuf = db->nextIn = db->nextOut = NULL;
|
|
db->mapped = db->ready = 0;
|
|
}
|
|
|
|
static int prog_dmabuf(struct au1000_state *s, struct dmabuf *db)
|
|
{
|
|
int order;
|
|
unsigned user_bytes_per_sec;
|
|
unsigned bufs;
|
|
struct page *page, *pend;
|
|
unsigned rate = db->sample_rate;
|
|
|
|
if (!db->rawbuf) {
|
|
db->ready = db->mapped = 0;
|
|
for (order = DMABUF_DEFAULTORDER;
|
|
order >= DMABUF_MINORDER; order--)
|
|
if ((db->rawbuf = dma_alloc_noncoherent(NULL,
|
|
PAGE_SIZE << order,
|
|
&db->dmaaddr,
|
|
0)))
|
|
break;
|
|
if (!db->rawbuf)
|
|
return -ENOMEM;
|
|
db->buforder = order;
|
|
/* now mark the pages as reserved;
|
|
otherwise remap_pfn_range doesn't do what we want */
|
|
pend = virt_to_page(db->rawbuf +
|
|
(PAGE_SIZE << db->buforder) - 1);
|
|
for (page = virt_to_page(db->rawbuf); page <= pend; page++)
|
|
SetPageReserved(page);
|
|
}
|
|
|
|
db->cnt_factor = 1;
|
|
if (db->sample_size == 8)
|
|
db->cnt_factor *= 2;
|
|
if (db->num_channels == 1)
|
|
db->cnt_factor *= 2;
|
|
db->cnt_factor *= db->src_factor;
|
|
|
|
db->count = 0;
|
|
db->nextIn = db->nextOut = db->rawbuf;
|
|
|
|
db->user_bytes_per_sample = (db->sample_size>>3) * db->num_channels;
|
|
db->dma_bytes_per_sample = 2 * ((db->num_channels == 1) ?
|
|
2 : db->num_channels);
|
|
|
|
user_bytes_per_sec = rate * db->user_bytes_per_sample;
|
|
bufs = PAGE_SIZE << db->buforder;
|
|
if (db->ossfragshift) {
|
|
if ((1000 << db->ossfragshift) < user_bytes_per_sec)
|
|
db->fragshift = ld2(user_bytes_per_sec/1000);
|
|
else
|
|
db->fragshift = db->ossfragshift;
|
|
} else {
|
|
db->fragshift = ld2(user_bytes_per_sec / 100 /
|
|
(db->subdivision ? db->subdivision : 1));
|
|
if (db->fragshift < 3)
|
|
db->fragshift = 3;
|
|
}
|
|
|
|
db->fragsize = 1 << db->fragshift;
|
|
db->dma_fragsize = db->fragsize * db->cnt_factor;
|
|
db->numfrag = bufs / db->dma_fragsize;
|
|
|
|
while (db->numfrag < 4 && db->fragshift > 3) {
|
|
db->fragshift--;
|
|
db->fragsize = 1 << db->fragshift;
|
|
db->dma_fragsize = db->fragsize * db->cnt_factor;
|
|
db->numfrag = bufs / db->dma_fragsize;
|
|
}
|
|
|
|
if (db->ossmaxfrags >= 4 && db->ossmaxfrags < db->numfrag)
|
|
db->numfrag = db->ossmaxfrags;
|
|
|
|
db->dmasize = db->dma_fragsize * db->numfrag;
|
|
memset(db->rawbuf, 0, bufs);
|
|
|
|
#ifdef AU1000_VERBOSE_DEBUG
|
|
dbg("rate=%d, samplesize=%d, channels=%d",
|
|
rate, db->sample_size, db->num_channels);
|
|
dbg("fragsize=%d, cnt_factor=%d, dma_fragsize=%d",
|
|
db->fragsize, db->cnt_factor, db->dma_fragsize);
|
|
dbg("numfrag=%d, dmasize=%d", db->numfrag, db->dmasize);
|
|
#endif
|
|
|
|
db->ready = 1;
|
|
return 0;
|
|
}
|
|
|
|
static inline int prog_dmabuf_adc(struct au1000_state *s)
|
|
{
|
|
stop_adc(s);
|
|
return prog_dmabuf(s, &s->dma_adc);
|
|
|
|
}
|
|
|
|
static inline int prog_dmabuf_dac(struct au1000_state *s)
|
|
{
|
|
stop_dac(s);
|
|
return prog_dmabuf(s, &s->dma_dac);
|
|
}
|
|
|
|
|
|
/* hold spinlock for the following */
|
|
static irqreturn_t dac_dma_interrupt(int irq, void *dev_id, struct pt_regs *regs)
|
|
{
|
|
struct au1000_state *s = (struct au1000_state *) dev_id;
|
|
struct dmabuf *dac = &s->dma_dac;
|
|
unsigned long newptr;
|
|
u32 ac97c_stat, buff_done;
|
|
|
|
ac97c_stat = au_readl(AC97C_STATUS);
|
|
#ifdef AU1000_VERBOSE_DEBUG
|
|
if (ac97c_stat & (AC97C_XU | AC97C_XO | AC97C_TE))
|
|
dbg("AC97C status = 0x%08x", ac97c_stat);
|
|
#endif
|
|
|
|
if ((buff_done = get_dma_buffer_done(dac->dmanr)) == 0) {
|
|
/* fastpath out, to ease interrupt sharing */
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
spin_lock(&s->lock);
|
|
|
|
if (buff_done != (DMA_D0 | DMA_D1)) {
|
|
dac->nextOut += dac->dma_fragsize;
|
|
if (dac->nextOut >= dac->rawbuf + dac->dmasize)
|
|
dac->nextOut -= dac->dmasize;
|
|
|
|
/* update playback pointers */
|
|
newptr = virt_to_phys(dac->nextOut) + dac->dma_fragsize;
|
|
if (newptr >= dac->dmaaddr + dac->dmasize)
|
|
newptr -= dac->dmasize;
|
|
|
|
dac->count -= dac->dma_fragsize;
|
|
dac->total_bytes += dac->dma_fragsize;
|
|
|
|
if (dac->count <= 0) {
|
|
#ifdef AU1000_VERBOSE_DEBUG
|
|
dbg("dac underrun");
|
|
#endif
|
|
spin_unlock(&s->lock);
|
|
stop_dac(s);
|
|
spin_lock(&s->lock);
|
|
dac->count = 0;
|
|
dac->nextIn = dac->nextOut;
|
|
} else if (buff_done == DMA_D0) {
|
|
clear_dma_done0(dac->dmanr); // clear DMA done bit
|
|
set_dma_count0(dac->dmanr, dac->dma_fragsize>>1);
|
|
set_dma_addr0(dac->dmanr, newptr);
|
|
enable_dma_buffer0(dac->dmanr); // reenable
|
|
} else {
|
|
clear_dma_done1(dac->dmanr); // clear DMA done bit
|
|
set_dma_count1(dac->dmanr, dac->dma_fragsize>>1);
|
|
set_dma_addr1(dac->dmanr, newptr);
|
|
enable_dma_buffer1(dac->dmanr); // reenable
|
|
}
|
|
} else {
|
|
// both done bits set, we missed an interrupt
|
|
spin_unlock(&s->lock);
|
|
stop_dac(s);
|
|
spin_lock(&s->lock);
|
|
|
|
dac->nextOut += 2*dac->dma_fragsize;
|
|
if (dac->nextOut >= dac->rawbuf + dac->dmasize)
|
|
dac->nextOut -= dac->dmasize;
|
|
|
|
dac->count -= 2*dac->dma_fragsize;
|
|
dac->total_bytes += 2*dac->dma_fragsize;
|
|
|
|
if (dac->count > 0) {
|
|
spin_unlock(&s->lock);
|
|
start_dac(s);
|
|
spin_lock(&s->lock);
|
|
}
|
|
}
|
|
|
|
/* wake up anybody listening */
|
|
if (waitqueue_active(&dac->wait))
|
|
wake_up(&dac->wait);
|
|
|
|
spin_unlock(&s->lock);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
|
|
static irqreturn_t adc_dma_interrupt(int irq, void *dev_id, struct pt_regs *regs)
|
|
{
|
|
struct au1000_state *s = (struct au1000_state *) dev_id;
|
|
struct dmabuf *adc = &s->dma_adc;
|
|
unsigned long newptr;
|
|
u32 ac97c_stat, buff_done;
|
|
|
|
ac97c_stat = au_readl(AC97C_STATUS);
|
|
#ifdef AU1000_VERBOSE_DEBUG
|
|
if (ac97c_stat & (AC97C_RU | AC97C_RO))
|
|
dbg("AC97C status = 0x%08x", ac97c_stat);
|
|
#endif
|
|
|
|
if ((buff_done = get_dma_buffer_done(adc->dmanr)) == 0) {
|
|
/* fastpath out, to ease interrupt sharing */
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
spin_lock(&s->lock);
|
|
|
|
if (buff_done != (DMA_D0 | DMA_D1)) {
|
|
if (adc->count + adc->dma_fragsize > adc->dmasize) {
|
|
// Overrun. Stop ADC and log the error
|
|
spin_unlock(&s->lock);
|
|
stop_adc(s);
|
|
adc->error++;
|
|
err("adc overrun");
|
|
return IRQ_NONE;
|
|
}
|
|
|
|
adc->nextIn += adc->dma_fragsize;
|
|
if (adc->nextIn >= adc->rawbuf + adc->dmasize)
|
|
adc->nextIn -= adc->dmasize;
|
|
|
|
/* update capture pointers */
|
|
newptr = virt_to_phys(adc->nextIn) + adc->dma_fragsize;
|
|
if (newptr >= adc->dmaaddr + adc->dmasize)
|
|
newptr -= adc->dmasize;
|
|
|
|
adc->count += adc->dma_fragsize;
|
|
adc->total_bytes += adc->dma_fragsize;
|
|
|
|
if (buff_done == DMA_D0) {
|
|
clear_dma_done0(adc->dmanr); // clear DMA done bit
|
|
set_dma_count0(adc->dmanr, adc->dma_fragsize>>1);
|
|
set_dma_addr0(adc->dmanr, newptr);
|
|
enable_dma_buffer0(adc->dmanr); // reenable
|
|
} else {
|
|
clear_dma_done1(adc->dmanr); // clear DMA done bit
|
|
set_dma_count1(adc->dmanr, adc->dma_fragsize>>1);
|
|
set_dma_addr1(adc->dmanr, newptr);
|
|
enable_dma_buffer1(adc->dmanr); // reenable
|
|
}
|
|
} else {
|
|
// both done bits set, we missed an interrupt
|
|
spin_unlock(&s->lock);
|
|
stop_adc(s);
|
|
spin_lock(&s->lock);
|
|
|
|
if (adc->count + 2*adc->dma_fragsize > adc->dmasize) {
|
|
// Overrun. Log the error
|
|
adc->error++;
|
|
err("adc overrun");
|
|
spin_unlock(&s->lock);
|
|
return IRQ_NONE;
|
|
}
|
|
|
|
adc->nextIn += 2*adc->dma_fragsize;
|
|
if (adc->nextIn >= adc->rawbuf + adc->dmasize)
|
|
adc->nextIn -= adc->dmasize;
|
|
|
|
adc->count += 2*adc->dma_fragsize;
|
|
adc->total_bytes += 2*adc->dma_fragsize;
|
|
|
|
spin_unlock(&s->lock);
|
|
start_adc(s);
|
|
spin_lock(&s->lock);
|
|
}
|
|
|
|
/* wake up anybody listening */
|
|
if (waitqueue_active(&adc->wait))
|
|
wake_up(&adc->wait);
|
|
|
|
spin_unlock(&s->lock);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
|
|
static loff_t au1000_llseek(struct file *file, loff_t offset, int origin)
|
|
{
|
|
return -ESPIPE;
|
|
}
|
|
|
|
|
|
static int au1000_open_mixdev(struct inode *inode, struct file *file)
|
|
{
|
|
file->private_data = &au1000_state;
|
|
return nonseekable_open(inode, file);
|
|
}
|
|
|
|
static int au1000_release_mixdev(struct inode *inode, struct file *file)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int mixdev_ioctl(struct ac97_codec *codec, unsigned int cmd,
|
|
unsigned long arg)
|
|
{
|
|
return codec->mixer_ioctl(codec, cmd, arg);
|
|
}
|
|
|
|
static int au1000_ioctl_mixdev(struct inode *inode, struct file *file,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct au1000_state *s = (struct au1000_state *)file->private_data;
|
|
struct ac97_codec *codec = &s->codec;
|
|
|
|
return mixdev_ioctl(codec, cmd, arg);
|
|
}
|
|
|
|
static /*const */ struct file_operations au1000_mixer_fops = {
|
|
.owner = THIS_MODULE,
|
|
.llseek = au1000_llseek,
|
|
.ioctl = au1000_ioctl_mixdev,
|
|
.open = au1000_open_mixdev,
|
|
.release = au1000_release_mixdev,
|
|
};
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
|
|
static int drain_dac(struct au1000_state *s, int nonblock)
|
|
{
|
|
unsigned long flags;
|
|
int count, tmo;
|
|
|
|
if (s->dma_dac.mapped || !s->dma_dac.ready || s->dma_dac.stopped)
|
|
return 0;
|
|
|
|
for (;;) {
|
|
spin_lock_irqsave(&s->lock, flags);
|
|
count = s->dma_dac.count;
|
|
spin_unlock_irqrestore(&s->lock, flags);
|
|
if (count <= 0)
|
|
break;
|
|
if (signal_pending(current))
|
|
break;
|
|
if (nonblock)
|
|
return -EBUSY;
|
|
tmo = 1000 * count / (s->no_vra ?
|
|
48000 : s->dma_dac.sample_rate);
|
|
tmo /= s->dma_dac.dma_bytes_per_sample;
|
|
au1000_delay(tmo);
|
|
}
|
|
if (signal_pending(current))
|
|
return -ERESTARTSYS;
|
|
return 0;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
|
|
static inline u8 S16_TO_U8(s16 ch)
|
|
{
|
|
return (u8) (ch >> 8) + 0x80;
|
|
}
|
|
static inline s16 U8_TO_S16(u8 ch)
|
|
{
|
|
return (s16) (ch - 0x80) << 8;
|
|
}
|
|
|
|
/*
|
|
* Translates user samples to dma buffer suitable for AC'97 DAC data:
|
|
* If mono, copy left channel to right channel in dma buffer.
|
|
* If 8 bit samples, cvt to 16-bit before writing to dma buffer.
|
|
* If interpolating (no VRA), duplicate every audio frame src_factor times.
|
|
*/
|
|
static int translate_from_user(struct dmabuf *db,
|
|
char* dmabuf,
|
|
char* userbuf,
|
|
int dmacount)
|
|
{
|
|
int sample, i;
|
|
int interp_bytes_per_sample;
|
|
int num_samples;
|
|
int mono = (db->num_channels == 1);
|
|
char usersample[12];
|
|
s16 ch, dmasample[6];
|
|
|
|
if (db->sample_size == 16 && !mono && db->src_factor == 1) {
|
|
// no translation necessary, just copy
|
|
if (copy_from_user(dmabuf, userbuf, dmacount))
|
|
return -EFAULT;
|
|
return dmacount;
|
|
}
|
|
|
|
interp_bytes_per_sample = db->dma_bytes_per_sample * db->src_factor;
|
|
num_samples = dmacount / interp_bytes_per_sample;
|
|
|
|
for (sample = 0; sample < num_samples; sample++) {
|
|
if (copy_from_user(usersample, userbuf,
|
|
db->user_bytes_per_sample)) {
|
|
dbg("%s: fault", __FUNCTION__);
|
|
return -EFAULT;
|
|
}
|
|
|
|
for (i = 0; i < db->num_channels; i++) {
|
|
if (db->sample_size == 8)
|
|
ch = U8_TO_S16(usersample[i]);
|
|
else
|
|
ch = *((s16 *) (&usersample[i * 2]));
|
|
dmasample[i] = ch;
|
|
if (mono)
|
|
dmasample[i + 1] = ch; // right channel
|
|
}
|
|
|
|
// duplicate every audio frame src_factor times
|
|
for (i = 0; i < db->src_factor; i++)
|
|
memcpy(dmabuf, dmasample, db->dma_bytes_per_sample);
|
|
|
|
userbuf += db->user_bytes_per_sample;
|
|
dmabuf += interp_bytes_per_sample;
|
|
}
|
|
|
|
return num_samples * interp_bytes_per_sample;
|
|
}
|
|
|
|
/*
|
|
* Translates AC'97 ADC samples to user buffer:
|
|
* If mono, send only left channel to user buffer.
|
|
* If 8 bit samples, cvt from 16 to 8 bit before writing to user buffer.
|
|
* If decimating (no VRA), skip over src_factor audio frames.
|
|
*/
|
|
static int translate_to_user(struct dmabuf *db,
|
|
char* userbuf,
|
|
char* dmabuf,
|
|
int dmacount)
|
|
{
|
|
int sample, i;
|
|
int interp_bytes_per_sample;
|
|
int num_samples;
|
|
int mono = (db->num_channels == 1);
|
|
char usersample[12];
|
|
|
|
if (db->sample_size == 16 && !mono && db->src_factor == 1) {
|
|
// no translation necessary, just copy
|
|
if (copy_to_user(userbuf, dmabuf, dmacount))
|
|
return -EFAULT;
|
|
return dmacount;
|
|
}
|
|
|
|
interp_bytes_per_sample = db->dma_bytes_per_sample * db->src_factor;
|
|
num_samples = dmacount / interp_bytes_per_sample;
|
|
|
|
for (sample = 0; sample < num_samples; sample++) {
|
|
for (i = 0; i < db->num_channels; i++) {
|
|
if (db->sample_size == 8)
|
|
usersample[i] =
|
|
S16_TO_U8(*((s16 *) (&dmabuf[i * 2])));
|
|
else
|
|
*((s16 *) (&usersample[i * 2])) =
|
|
*((s16 *) (&dmabuf[i * 2]));
|
|
}
|
|
|
|
if (copy_to_user(userbuf, usersample,
|
|
db->user_bytes_per_sample)) {
|
|
dbg("%s: fault", __FUNCTION__);
|
|
return -EFAULT;
|
|
}
|
|
|
|
userbuf += db->user_bytes_per_sample;
|
|
dmabuf += interp_bytes_per_sample;
|
|
}
|
|
|
|
return num_samples * interp_bytes_per_sample;
|
|
}
|
|
|
|
/*
|
|
* Copy audio data to/from user buffer from/to dma buffer, taking care
|
|
* that we wrap when reading/writing the dma buffer. Returns actual byte
|
|
* count written to or read from the dma buffer.
|
|
*/
|
|
static int copy_dmabuf_user(struct dmabuf *db, char* userbuf,
|
|
int count, int to_user)
|
|
{
|
|
char *bufptr = to_user ? db->nextOut : db->nextIn;
|
|
char *bufend = db->rawbuf + db->dmasize;
|
|
int cnt, ret;
|
|
|
|
if (bufptr + count > bufend) {
|
|
int partial = (int) (bufend - bufptr);
|
|
if (to_user) {
|
|
if ((cnt = translate_to_user(db, userbuf,
|
|
bufptr, partial)) < 0)
|
|
return cnt;
|
|
ret = cnt;
|
|
if ((cnt = translate_to_user(db, userbuf + partial,
|
|
db->rawbuf,
|
|
count - partial)) < 0)
|
|
return cnt;
|
|
ret += cnt;
|
|
} else {
|
|
if ((cnt = translate_from_user(db, bufptr, userbuf,
|
|
partial)) < 0)
|
|
return cnt;
|
|
ret = cnt;
|
|
if ((cnt = translate_from_user(db, db->rawbuf,
|
|
userbuf + partial,
|
|
count - partial)) < 0)
|
|
return cnt;
|
|
ret += cnt;
|
|
}
|
|
} else {
|
|
if (to_user)
|
|
ret = translate_to_user(db, userbuf, bufptr, count);
|
|
else
|
|
ret = translate_from_user(db, bufptr, userbuf, count);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
static ssize_t au1000_read(struct file *file, char *buffer,
|
|
size_t count, loff_t *ppos)
|
|
{
|
|
struct au1000_state *s = (struct au1000_state *)file->private_data;
|
|
struct dmabuf *db = &s->dma_adc;
|
|
DECLARE_WAITQUEUE(wait, current);
|
|
ssize_t ret;
|
|
unsigned long flags;
|
|
int cnt, usercnt, avail;
|
|
|
|
if (db->mapped)
|
|
return -ENXIO;
|
|
if (!access_ok(VERIFY_WRITE, buffer, count))
|
|
return -EFAULT;
|
|
ret = 0;
|
|
|
|
count *= db->cnt_factor;
|
|
|
|
mutex_lock(&s->sem);
|
|
add_wait_queue(&db->wait, &wait);
|
|
|
|
while (count > 0) {
|
|
// wait for samples in ADC dma buffer
|
|
do {
|
|
if (db->stopped)
|
|
start_adc(s);
|
|
spin_lock_irqsave(&s->lock, flags);
|
|
avail = db->count;
|
|
if (avail <= 0)
|
|
__set_current_state(TASK_INTERRUPTIBLE);
|
|
spin_unlock_irqrestore(&s->lock, flags);
|
|
if (avail <= 0) {
|
|
if (file->f_flags & O_NONBLOCK) {
|
|
if (!ret)
|
|
ret = -EAGAIN;
|
|
goto out;
|
|
}
|
|
mutex_unlock(&s->sem);
|
|
schedule();
|
|
if (signal_pending(current)) {
|
|
if (!ret)
|
|
ret = -ERESTARTSYS;
|
|
goto out2;
|
|
}
|
|
mutex_lock(&s->sem);
|
|
}
|
|
} while (avail <= 0);
|
|
|
|
// copy from nextOut to user
|
|
if ((cnt = copy_dmabuf_user(db, buffer,
|
|
count > avail ?
|
|
avail : count, 1)) < 0) {
|
|
if (!ret)
|
|
ret = -EFAULT;
|
|
goto out;
|
|
}
|
|
|
|
spin_lock_irqsave(&s->lock, flags);
|
|
db->count -= cnt;
|
|
db->nextOut += cnt;
|
|
if (db->nextOut >= db->rawbuf + db->dmasize)
|
|
db->nextOut -= db->dmasize;
|
|
spin_unlock_irqrestore(&s->lock, flags);
|
|
|
|
count -= cnt;
|
|
usercnt = cnt / db->cnt_factor;
|
|
buffer += usercnt;
|
|
ret += usercnt;
|
|
} // while (count > 0)
|
|
|
|
out:
|
|
mutex_unlock(&s->sem);
|
|
out2:
|
|
remove_wait_queue(&db->wait, &wait);
|
|
set_current_state(TASK_RUNNING);
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t au1000_write(struct file *file, const char *buffer,
|
|
size_t count, loff_t * ppos)
|
|
{
|
|
struct au1000_state *s = (struct au1000_state *)file->private_data;
|
|
struct dmabuf *db = &s->dma_dac;
|
|
DECLARE_WAITQUEUE(wait, current);
|
|
ssize_t ret = 0;
|
|
unsigned long flags;
|
|
int cnt, usercnt, avail;
|
|
|
|
#ifdef AU1000_VERBOSE_DEBUG
|
|
dbg("write: count=%d", count);
|
|
#endif
|
|
|
|
if (db->mapped)
|
|
return -ENXIO;
|
|
if (!access_ok(VERIFY_READ, buffer, count))
|
|
return -EFAULT;
|
|
|
|
count *= db->cnt_factor;
|
|
|
|
mutex_lock(&s->sem);
|
|
add_wait_queue(&db->wait, &wait);
|
|
|
|
while (count > 0) {
|
|
// wait for space in playback buffer
|
|
do {
|
|
spin_lock_irqsave(&s->lock, flags);
|
|
avail = (int) db->dmasize - db->count;
|
|
if (avail <= 0)
|
|
__set_current_state(TASK_INTERRUPTIBLE);
|
|
spin_unlock_irqrestore(&s->lock, flags);
|
|
if (avail <= 0) {
|
|
if (file->f_flags & O_NONBLOCK) {
|
|
if (!ret)
|
|
ret = -EAGAIN;
|
|
goto out;
|
|
}
|
|
mutex_unlock(&s->sem);
|
|
schedule();
|
|
if (signal_pending(current)) {
|
|
if (!ret)
|
|
ret = -ERESTARTSYS;
|
|
goto out2;
|
|
}
|
|
mutex_lock(&s->sem);
|
|
}
|
|
} while (avail <= 0);
|
|
|
|
// copy from user to nextIn
|
|
if ((cnt = copy_dmabuf_user(db, (char *) buffer,
|
|
count > avail ?
|
|
avail : count, 0)) < 0) {
|
|
if (!ret)
|
|
ret = -EFAULT;
|
|
goto out;
|
|
}
|
|
|
|
spin_lock_irqsave(&s->lock, flags);
|
|
db->count += cnt;
|
|
db->nextIn += cnt;
|
|
if (db->nextIn >= db->rawbuf + db->dmasize)
|
|
db->nextIn -= db->dmasize;
|
|
spin_unlock_irqrestore(&s->lock, flags);
|
|
if (db->stopped)
|
|
start_dac(s);
|
|
|
|
count -= cnt;
|
|
usercnt = cnt / db->cnt_factor;
|
|
buffer += usercnt;
|
|
ret += usercnt;
|
|
} // while (count > 0)
|
|
|
|
out:
|
|
mutex_unlock(&s->sem);
|
|
out2:
|
|
remove_wait_queue(&db->wait, &wait);
|
|
set_current_state(TASK_RUNNING);
|
|
return ret;
|
|
}
|
|
|
|
|
|
/* No kernel lock - we have our own spinlock */
|
|
static unsigned int au1000_poll(struct file *file,
|
|
struct poll_table_struct *wait)
|
|
{
|
|
struct au1000_state *s = (struct au1000_state *)file->private_data;
|
|
unsigned long flags;
|
|
unsigned int mask = 0;
|
|
|
|
if (file->f_mode & FMODE_WRITE) {
|
|
if (!s->dma_dac.ready)
|
|
return 0;
|
|
poll_wait(file, &s->dma_dac.wait, wait);
|
|
}
|
|
if (file->f_mode & FMODE_READ) {
|
|
if (!s->dma_adc.ready)
|
|
return 0;
|
|
poll_wait(file, &s->dma_adc.wait, wait);
|
|
}
|
|
|
|
spin_lock_irqsave(&s->lock, flags);
|
|
|
|
if (file->f_mode & FMODE_READ) {
|
|
if (s->dma_adc.count >= (signed)s->dma_adc.dma_fragsize)
|
|
mask |= POLLIN | POLLRDNORM;
|
|
}
|
|
if (file->f_mode & FMODE_WRITE) {
|
|
if (s->dma_dac.mapped) {
|
|
if (s->dma_dac.count >=
|
|
(signed)s->dma_dac.dma_fragsize)
|
|
mask |= POLLOUT | POLLWRNORM;
|
|
} else {
|
|
if ((signed) s->dma_dac.dmasize >=
|
|
s->dma_dac.count + (signed)s->dma_dac.dma_fragsize)
|
|
mask |= POLLOUT | POLLWRNORM;
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&s->lock, flags);
|
|
return mask;
|
|
}
|
|
|
|
static int au1000_mmap(struct file *file, struct vm_area_struct *vma)
|
|
{
|
|
struct au1000_state *s = (struct au1000_state *)file->private_data;
|
|
struct dmabuf *db;
|
|
unsigned long size;
|
|
int ret = 0;
|
|
|
|
dbg("%s", __FUNCTION__);
|
|
|
|
lock_kernel();
|
|
mutex_lock(&s->sem);
|
|
if (vma->vm_flags & VM_WRITE)
|
|
db = &s->dma_dac;
|
|
else if (vma->vm_flags & VM_READ)
|
|
db = &s->dma_adc;
|
|
else {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
if (vma->vm_pgoff != 0) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
size = vma->vm_end - vma->vm_start;
|
|
if (size > (PAGE_SIZE << db->buforder)) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
if (remap_pfn_range(vma, vma->vm_start, virt_to_phys(db->rawbuf),
|
|
size, vma->vm_page_prot)) {
|
|
ret = -EAGAIN;
|
|
goto out;
|
|
}
|
|
vma->vm_flags &= ~VM_IO;
|
|
db->mapped = 1;
|
|
out:
|
|
mutex_unlock(&s->sem);
|
|
unlock_kernel();
|
|
return ret;
|
|
}
|
|
|
|
|
|
#ifdef AU1000_VERBOSE_DEBUG
|
|
static struct ioctl_str_t {
|
|
unsigned int cmd;
|
|
const char *str;
|
|
} ioctl_str[] = {
|
|
{SNDCTL_DSP_RESET, "SNDCTL_DSP_RESET"},
|
|
{SNDCTL_DSP_SYNC, "SNDCTL_DSP_SYNC"},
|
|
{SNDCTL_DSP_SPEED, "SNDCTL_DSP_SPEED"},
|
|
{SNDCTL_DSP_STEREO, "SNDCTL_DSP_STEREO"},
|
|
{SNDCTL_DSP_GETBLKSIZE, "SNDCTL_DSP_GETBLKSIZE"},
|
|
{SNDCTL_DSP_SAMPLESIZE, "SNDCTL_DSP_SAMPLESIZE"},
|
|
{SNDCTL_DSP_CHANNELS, "SNDCTL_DSP_CHANNELS"},
|
|
{SOUND_PCM_WRITE_CHANNELS, "SOUND_PCM_WRITE_CHANNELS"},
|
|
{SOUND_PCM_WRITE_FILTER, "SOUND_PCM_WRITE_FILTER"},
|
|
{SNDCTL_DSP_POST, "SNDCTL_DSP_POST"},
|
|
{SNDCTL_DSP_SUBDIVIDE, "SNDCTL_DSP_SUBDIVIDE"},
|
|
{SNDCTL_DSP_SETFRAGMENT, "SNDCTL_DSP_SETFRAGMENT"},
|
|
{SNDCTL_DSP_GETFMTS, "SNDCTL_DSP_GETFMTS"},
|
|
{SNDCTL_DSP_SETFMT, "SNDCTL_DSP_SETFMT"},
|
|
{SNDCTL_DSP_GETOSPACE, "SNDCTL_DSP_GETOSPACE"},
|
|
{SNDCTL_DSP_GETISPACE, "SNDCTL_DSP_GETISPACE"},
|
|
{SNDCTL_DSP_NONBLOCK, "SNDCTL_DSP_NONBLOCK"},
|
|
{SNDCTL_DSP_GETCAPS, "SNDCTL_DSP_GETCAPS"},
|
|
{SNDCTL_DSP_GETTRIGGER, "SNDCTL_DSP_GETTRIGGER"},
|
|
{SNDCTL_DSP_SETTRIGGER, "SNDCTL_DSP_SETTRIGGER"},
|
|
{SNDCTL_DSP_GETIPTR, "SNDCTL_DSP_GETIPTR"},
|
|
{SNDCTL_DSP_GETOPTR, "SNDCTL_DSP_GETOPTR"},
|
|
{SNDCTL_DSP_MAPINBUF, "SNDCTL_DSP_MAPINBUF"},
|
|
{SNDCTL_DSP_MAPOUTBUF, "SNDCTL_DSP_MAPOUTBUF"},
|
|
{SNDCTL_DSP_SETSYNCRO, "SNDCTL_DSP_SETSYNCRO"},
|
|
{SNDCTL_DSP_SETDUPLEX, "SNDCTL_DSP_SETDUPLEX"},
|
|
{SNDCTL_DSP_GETODELAY, "SNDCTL_DSP_GETODELAY"},
|
|
{SNDCTL_DSP_GETCHANNELMASK, "SNDCTL_DSP_GETCHANNELMASK"},
|
|
{SNDCTL_DSP_BIND_CHANNEL, "SNDCTL_DSP_BIND_CHANNEL"},
|
|
{OSS_GETVERSION, "OSS_GETVERSION"},
|
|
{SOUND_PCM_READ_RATE, "SOUND_PCM_READ_RATE"},
|
|
{SOUND_PCM_READ_CHANNELS, "SOUND_PCM_READ_CHANNELS"},
|
|
{SOUND_PCM_READ_BITS, "SOUND_PCM_READ_BITS"},
|
|
{SOUND_PCM_READ_FILTER, "SOUND_PCM_READ_FILTER"}
|
|
};
|
|
#endif
|
|
|
|
// Need to hold a spin-lock before calling this!
|
|
static int dma_count_done(struct dmabuf *db)
|
|
{
|
|
if (db->stopped)
|
|
return 0;
|
|
|
|
return db->dma_fragsize - get_dma_residue(db->dmanr);
|
|
}
|
|
|
|
|
|
static int au1000_ioctl(struct inode *inode, struct file *file,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct au1000_state *s = (struct au1000_state *)file->private_data;
|
|
unsigned long flags;
|
|
audio_buf_info abinfo;
|
|
count_info cinfo;
|
|
int count;
|
|
int val, mapped, ret, diff;
|
|
|
|
mapped = ((file->f_mode & FMODE_WRITE) && s->dma_dac.mapped) ||
|
|
((file->f_mode & FMODE_READ) && s->dma_adc.mapped);
|
|
|
|
#ifdef AU1000_VERBOSE_DEBUG
|
|
for (count=0; count<sizeof(ioctl_str)/sizeof(ioctl_str[0]); count++) {
|
|
if (ioctl_str[count].cmd == cmd)
|
|
break;
|
|
}
|
|
if (count < sizeof(ioctl_str) / sizeof(ioctl_str[0]))
|
|
dbg("ioctl %s, arg=0x%lx", ioctl_str[count].str, arg);
|
|
else
|
|
dbg("ioctl 0x%x unknown, arg=0x%lx", cmd, arg);
|
|
#endif
|
|
|
|
switch (cmd) {
|
|
case OSS_GETVERSION:
|
|
return put_user(SOUND_VERSION, (int *) arg);
|
|
|
|
case SNDCTL_DSP_SYNC:
|
|
if (file->f_mode & FMODE_WRITE)
|
|
return drain_dac(s, file->f_flags & O_NONBLOCK);
|
|
return 0;
|
|
|
|
case SNDCTL_DSP_SETDUPLEX:
|
|
return 0;
|
|
|
|
case SNDCTL_DSP_GETCAPS:
|
|
return put_user(DSP_CAP_DUPLEX | DSP_CAP_REALTIME |
|
|
DSP_CAP_TRIGGER | DSP_CAP_MMAP, (int *)arg);
|
|
|
|
case SNDCTL_DSP_RESET:
|
|
if (file->f_mode & FMODE_WRITE) {
|
|
stop_dac(s);
|
|
synchronize_irq();
|
|
s->dma_dac.count = s->dma_dac.total_bytes = 0;
|
|
s->dma_dac.nextIn = s->dma_dac.nextOut =
|
|
s->dma_dac.rawbuf;
|
|
}
|
|
if (file->f_mode & FMODE_READ) {
|
|
stop_adc(s);
|
|
synchronize_irq();
|
|
s->dma_adc.count = s->dma_adc.total_bytes = 0;
|
|
s->dma_adc.nextIn = s->dma_adc.nextOut =
|
|
s->dma_adc.rawbuf;
|
|
}
|
|
return 0;
|
|
|
|
case SNDCTL_DSP_SPEED:
|
|
if (get_user(val, (int *) arg))
|
|
return -EFAULT;
|
|
if (val >= 0) {
|
|
if (file->f_mode & FMODE_READ) {
|
|
stop_adc(s);
|
|
set_adc_rate(s, val);
|
|
}
|
|
if (file->f_mode & FMODE_WRITE) {
|
|
stop_dac(s);
|
|
set_dac_rate(s, val);
|
|
}
|
|
if (s->open_mode & FMODE_READ)
|
|
if ((ret = prog_dmabuf_adc(s)))
|
|
return ret;
|
|
if (s->open_mode & FMODE_WRITE)
|
|
if ((ret = prog_dmabuf_dac(s)))
|
|
return ret;
|
|
}
|
|
return put_user((file->f_mode & FMODE_READ) ?
|
|
s->dma_adc.sample_rate :
|
|
s->dma_dac.sample_rate,
|
|
(int *)arg);
|
|
|
|
case SNDCTL_DSP_STEREO:
|
|
if (get_user(val, (int *) arg))
|
|
return -EFAULT;
|
|
if (file->f_mode & FMODE_READ) {
|
|
stop_adc(s);
|
|
s->dma_adc.num_channels = val ? 2 : 1;
|
|
if ((ret = prog_dmabuf_adc(s)))
|
|
return ret;
|
|
}
|
|
if (file->f_mode & FMODE_WRITE) {
|
|
stop_dac(s);
|
|
s->dma_dac.num_channels = val ? 2 : 1;
|
|
if (s->codec_ext_caps & AC97_EXT_DACS) {
|
|
// disable surround and center/lfe in AC'97
|
|
u16 ext_stat = rdcodec(&s->codec,
|
|
AC97_EXTENDED_STATUS);
|
|
wrcodec(&s->codec, AC97_EXTENDED_STATUS,
|
|
ext_stat | (AC97_EXTSTAT_PRI |
|
|
AC97_EXTSTAT_PRJ |
|
|
AC97_EXTSTAT_PRK));
|
|
}
|
|
if ((ret = prog_dmabuf_dac(s)))
|
|
return ret;
|
|
}
|
|
return 0;
|
|
|
|
case SNDCTL_DSP_CHANNELS:
|
|
if (get_user(val, (int *) arg))
|
|
return -EFAULT;
|
|
if (val != 0) {
|
|
if (file->f_mode & FMODE_READ) {
|
|
if (val < 0 || val > 2)
|
|
return -EINVAL;
|
|
stop_adc(s);
|
|
s->dma_adc.num_channels = val;
|
|
if ((ret = prog_dmabuf_adc(s)))
|
|
return ret;
|
|
}
|
|
if (file->f_mode & FMODE_WRITE) {
|
|
switch (val) {
|
|
case 1:
|
|
case 2:
|
|
break;
|
|
case 3:
|
|
case 5:
|
|
return -EINVAL;
|
|
case 4:
|
|
if (!(s->codec_ext_caps &
|
|
AC97_EXTID_SDAC))
|
|
return -EINVAL;
|
|
break;
|
|
case 6:
|
|
if ((s->codec_ext_caps &
|
|
AC97_EXT_DACS) != AC97_EXT_DACS)
|
|
return -EINVAL;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
stop_dac(s);
|
|
if (val <= 2 &&
|
|
(s->codec_ext_caps & AC97_EXT_DACS)) {
|
|
// disable surround and center/lfe
|
|
// channels in AC'97
|
|
u16 ext_stat =
|
|
rdcodec(&s->codec,
|
|
AC97_EXTENDED_STATUS);
|
|
wrcodec(&s->codec,
|
|
AC97_EXTENDED_STATUS,
|
|
ext_stat | (AC97_EXTSTAT_PRI |
|
|
AC97_EXTSTAT_PRJ |
|
|
AC97_EXTSTAT_PRK));
|
|
} else if (val >= 4) {
|
|
// enable surround, center/lfe
|
|
// channels in AC'97
|
|
u16 ext_stat =
|
|
rdcodec(&s->codec,
|
|
AC97_EXTENDED_STATUS);
|
|
ext_stat &= ~AC97_EXTSTAT_PRJ;
|
|
if (val == 6)
|
|
ext_stat &=
|
|
~(AC97_EXTSTAT_PRI |
|
|
AC97_EXTSTAT_PRK);
|
|
wrcodec(&s->codec,
|
|
AC97_EXTENDED_STATUS,
|
|
ext_stat);
|
|
}
|
|
|
|
s->dma_dac.num_channels = val;
|
|
if ((ret = prog_dmabuf_dac(s)))
|
|
return ret;
|
|
}
|
|
}
|
|
return put_user(val, (int *) arg);
|
|
|
|
case SNDCTL_DSP_GETFMTS: /* Returns a mask */
|
|
return put_user(AFMT_S16_LE | AFMT_U8, (int *) arg);
|
|
|
|
case SNDCTL_DSP_SETFMT: /* Selects ONE fmt */
|
|
if (get_user(val, (int *) arg))
|
|
return -EFAULT;
|
|
if (val != AFMT_QUERY) {
|
|
if (file->f_mode & FMODE_READ) {
|
|
stop_adc(s);
|
|
if (val == AFMT_S16_LE)
|
|
s->dma_adc.sample_size = 16;
|
|
else {
|
|
val = AFMT_U8;
|
|
s->dma_adc.sample_size = 8;
|
|
}
|
|
if ((ret = prog_dmabuf_adc(s)))
|
|
return ret;
|
|
}
|
|
if (file->f_mode & FMODE_WRITE) {
|
|
stop_dac(s);
|
|
if (val == AFMT_S16_LE)
|
|
s->dma_dac.sample_size = 16;
|
|
else {
|
|
val = AFMT_U8;
|
|
s->dma_dac.sample_size = 8;
|
|
}
|
|
if ((ret = prog_dmabuf_dac(s)))
|
|
return ret;
|
|
}
|
|
} else {
|
|
if (file->f_mode & FMODE_READ)
|
|
val = (s->dma_adc.sample_size == 16) ?
|
|
AFMT_S16_LE : AFMT_U8;
|
|
else
|
|
val = (s->dma_dac.sample_size == 16) ?
|
|
AFMT_S16_LE : AFMT_U8;
|
|
}
|
|
return put_user(val, (int *) arg);
|
|
|
|
case SNDCTL_DSP_POST:
|
|
return 0;
|
|
|
|
case SNDCTL_DSP_GETTRIGGER:
|
|
val = 0;
|
|
spin_lock_irqsave(&s->lock, flags);
|
|
if (file->f_mode & FMODE_READ && !s->dma_adc.stopped)
|
|
val |= PCM_ENABLE_INPUT;
|
|
if (file->f_mode & FMODE_WRITE && !s->dma_dac.stopped)
|
|
val |= PCM_ENABLE_OUTPUT;
|
|
spin_unlock_irqrestore(&s->lock, flags);
|
|
return put_user(val, (int *) arg);
|
|
|
|
case SNDCTL_DSP_SETTRIGGER:
|
|
if (get_user(val, (int *) arg))
|
|
return -EFAULT;
|
|
if (file->f_mode & FMODE_READ) {
|
|
if (val & PCM_ENABLE_INPUT)
|
|
start_adc(s);
|
|
else
|
|
stop_adc(s);
|
|
}
|
|
if (file->f_mode & FMODE_WRITE) {
|
|
if (val & PCM_ENABLE_OUTPUT)
|
|
start_dac(s);
|
|
else
|
|
stop_dac(s);
|
|
}
|
|
return 0;
|
|
|
|
case SNDCTL_DSP_GETOSPACE:
|
|
if (!(file->f_mode & FMODE_WRITE))
|
|
return -EINVAL;
|
|
abinfo.fragsize = s->dma_dac.fragsize;
|
|
spin_lock_irqsave(&s->lock, flags);
|
|
count = s->dma_dac.count;
|
|
count -= dma_count_done(&s->dma_dac);
|
|
spin_unlock_irqrestore(&s->lock, flags);
|
|
if (count < 0)
|
|
count = 0;
|
|
abinfo.bytes = (s->dma_dac.dmasize - count) /
|
|
s->dma_dac.cnt_factor;
|
|
abinfo.fragstotal = s->dma_dac.numfrag;
|
|
abinfo.fragments = abinfo.bytes >> s->dma_dac.fragshift;
|
|
#ifdef AU1000_VERBOSE_DEBUG
|
|
dbg("bytes=%d, fragments=%d", abinfo.bytes, abinfo.fragments);
|
|
#endif
|
|
return copy_to_user((void *) arg, &abinfo,
|
|
sizeof(abinfo)) ? -EFAULT : 0;
|
|
|
|
case SNDCTL_DSP_GETISPACE:
|
|
if (!(file->f_mode & FMODE_READ))
|
|
return -EINVAL;
|
|
abinfo.fragsize = s->dma_adc.fragsize;
|
|
spin_lock_irqsave(&s->lock, flags);
|
|
count = s->dma_adc.count;
|
|
count += dma_count_done(&s->dma_adc);
|
|
spin_unlock_irqrestore(&s->lock, flags);
|
|
if (count < 0)
|
|
count = 0;
|
|
abinfo.bytes = count / s->dma_adc.cnt_factor;
|
|
abinfo.fragstotal = s->dma_adc.numfrag;
|
|
abinfo.fragments = abinfo.bytes >> s->dma_adc.fragshift;
|
|
return copy_to_user((void *) arg, &abinfo,
|
|
sizeof(abinfo)) ? -EFAULT : 0;
|
|
|
|
case SNDCTL_DSP_NONBLOCK:
|
|
file->f_flags |= O_NONBLOCK;
|
|
return 0;
|
|
|
|
case SNDCTL_DSP_GETODELAY:
|
|
if (!(file->f_mode & FMODE_WRITE))
|
|
return -EINVAL;
|
|
spin_lock_irqsave(&s->lock, flags);
|
|
count = s->dma_dac.count;
|
|
count -= dma_count_done(&s->dma_dac);
|
|
spin_unlock_irqrestore(&s->lock, flags);
|
|
if (count < 0)
|
|
count = 0;
|
|
count /= s->dma_dac.cnt_factor;
|
|
return put_user(count, (int *) arg);
|
|
|
|
case SNDCTL_DSP_GETIPTR:
|
|
if (!(file->f_mode & FMODE_READ))
|
|
return -EINVAL;
|
|
spin_lock_irqsave(&s->lock, flags);
|
|
cinfo.bytes = s->dma_adc.total_bytes;
|
|
count = s->dma_adc.count;
|
|
if (!s->dma_adc.stopped) {
|
|
diff = dma_count_done(&s->dma_adc);
|
|
count += diff;
|
|
cinfo.bytes += diff;
|
|
cinfo.ptr = virt_to_phys(s->dma_adc.nextIn) + diff -
|
|
s->dma_adc.dmaaddr;
|
|
} else
|
|
cinfo.ptr = virt_to_phys(s->dma_adc.nextIn) -
|
|
s->dma_adc.dmaaddr;
|
|
if (s->dma_adc.mapped)
|
|
s->dma_adc.count &= (s->dma_adc.dma_fragsize-1);
|
|
spin_unlock_irqrestore(&s->lock, flags);
|
|
if (count < 0)
|
|
count = 0;
|
|
cinfo.blocks = count >> s->dma_adc.fragshift;
|
|
return copy_to_user((void *) arg, &cinfo, sizeof(cinfo)) ? -EFAULT : 0;
|
|
|
|
case SNDCTL_DSP_GETOPTR:
|
|
if (!(file->f_mode & FMODE_READ))
|
|
return -EINVAL;
|
|
spin_lock_irqsave(&s->lock, flags);
|
|
cinfo.bytes = s->dma_dac.total_bytes;
|
|
count = s->dma_dac.count;
|
|
if (!s->dma_dac.stopped) {
|
|
diff = dma_count_done(&s->dma_dac);
|
|
count -= diff;
|
|
cinfo.bytes += diff;
|
|
cinfo.ptr = virt_to_phys(s->dma_dac.nextOut) + diff -
|
|
s->dma_dac.dmaaddr;
|
|
} else
|
|
cinfo.ptr = virt_to_phys(s->dma_dac.nextOut) -
|
|
s->dma_dac.dmaaddr;
|
|
if (s->dma_dac.mapped)
|
|
s->dma_dac.count &= (s->dma_dac.dma_fragsize-1);
|
|
spin_unlock_irqrestore(&s->lock, flags);
|
|
if (count < 0)
|
|
count = 0;
|
|
cinfo.blocks = count >> s->dma_dac.fragshift;
|
|
return copy_to_user((void *) arg, &cinfo, sizeof(cinfo)) ? -EFAULT : 0;
|
|
|
|
case SNDCTL_DSP_GETBLKSIZE:
|
|
if (file->f_mode & FMODE_WRITE)
|
|
return put_user(s->dma_dac.fragsize, (int *) arg);
|
|
else
|
|
return put_user(s->dma_adc.fragsize, (int *) arg);
|
|
|
|
case SNDCTL_DSP_SETFRAGMENT:
|
|
if (get_user(val, (int *) arg))
|
|
return -EFAULT;
|
|
if (file->f_mode & FMODE_READ) {
|
|
stop_adc(s);
|
|
s->dma_adc.ossfragshift = val & 0xffff;
|
|
s->dma_adc.ossmaxfrags = (val >> 16) & 0xffff;
|
|
if (s->dma_adc.ossfragshift < 4)
|
|
s->dma_adc.ossfragshift = 4;
|
|
if (s->dma_adc.ossfragshift > 15)
|
|
s->dma_adc.ossfragshift = 15;
|
|
if (s->dma_adc.ossmaxfrags < 4)
|
|
s->dma_adc.ossmaxfrags = 4;
|
|
if ((ret = prog_dmabuf_adc(s)))
|
|
return ret;
|
|
}
|
|
if (file->f_mode & FMODE_WRITE) {
|
|
stop_dac(s);
|
|
s->dma_dac.ossfragshift = val & 0xffff;
|
|
s->dma_dac.ossmaxfrags = (val >> 16) & 0xffff;
|
|
if (s->dma_dac.ossfragshift < 4)
|
|
s->dma_dac.ossfragshift = 4;
|
|
if (s->dma_dac.ossfragshift > 15)
|
|
s->dma_dac.ossfragshift = 15;
|
|
if (s->dma_dac.ossmaxfrags < 4)
|
|
s->dma_dac.ossmaxfrags = 4;
|
|
if ((ret = prog_dmabuf_dac(s)))
|
|
return ret;
|
|
}
|
|
return 0;
|
|
|
|
case SNDCTL_DSP_SUBDIVIDE:
|
|
if ((file->f_mode & FMODE_READ && s->dma_adc.subdivision) ||
|
|
(file->f_mode & FMODE_WRITE && s->dma_dac.subdivision))
|
|
return -EINVAL;
|
|
if (get_user(val, (int *) arg))
|
|
return -EFAULT;
|
|
if (val != 1 && val != 2 && val != 4)
|
|
return -EINVAL;
|
|
if (file->f_mode & FMODE_READ) {
|
|
stop_adc(s);
|
|
s->dma_adc.subdivision = val;
|
|
if ((ret = prog_dmabuf_adc(s)))
|
|
return ret;
|
|
}
|
|
if (file->f_mode & FMODE_WRITE) {
|
|
stop_dac(s);
|
|
s->dma_dac.subdivision = val;
|
|
if ((ret = prog_dmabuf_dac(s)))
|
|
return ret;
|
|
}
|
|
return 0;
|
|
|
|
case SOUND_PCM_READ_RATE:
|
|
return put_user((file->f_mode & FMODE_READ) ?
|
|
s->dma_adc.sample_rate :
|
|
s->dma_dac.sample_rate,
|
|
(int *)arg);
|
|
|
|
case SOUND_PCM_READ_CHANNELS:
|
|
if (file->f_mode & FMODE_READ)
|
|
return put_user(s->dma_adc.num_channels, (int *)arg);
|
|
else
|
|
return put_user(s->dma_dac.num_channels, (int *)arg);
|
|
|
|
case SOUND_PCM_READ_BITS:
|
|
if (file->f_mode & FMODE_READ)
|
|
return put_user(s->dma_adc.sample_size, (int *)arg);
|
|
else
|
|
return put_user(s->dma_dac.sample_size, (int *)arg);
|
|
|
|
case SOUND_PCM_WRITE_FILTER:
|
|
case SNDCTL_DSP_SETSYNCRO:
|
|
case SOUND_PCM_READ_FILTER:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return mixdev_ioctl(&s->codec, cmd, arg);
|
|
}
|
|
|
|
|
|
static int au1000_open(struct inode *inode, struct file *file)
|
|
{
|
|
int minor = iminor(inode);
|
|
DECLARE_WAITQUEUE(wait, current);
|
|
struct au1000_state *s = &au1000_state;
|
|
int ret;
|
|
|
|
#ifdef AU1000_VERBOSE_DEBUG
|
|
if (file->f_flags & O_NONBLOCK)
|
|
dbg("%s: non-blocking", __FUNCTION__);
|
|
else
|
|
dbg("%s: blocking", __FUNCTION__);
|
|
#endif
|
|
|
|
file->private_data = s;
|
|
/* wait for device to become free */
|
|
mutex_lock(&s->open_mutex);
|
|
while (s->open_mode & file->f_mode) {
|
|
if (file->f_flags & O_NONBLOCK) {
|
|
mutex_unlock(&s->open_mutex);
|
|
return -EBUSY;
|
|
}
|
|
add_wait_queue(&s->open_wait, &wait);
|
|
__set_current_state(TASK_INTERRUPTIBLE);
|
|
mutex_unlock(&s->open_mutex);
|
|
schedule();
|
|
remove_wait_queue(&s->open_wait, &wait);
|
|
set_current_state(TASK_RUNNING);
|
|
if (signal_pending(current))
|
|
return -ERESTARTSYS;
|
|
mutex_lock(&s->open_mutex);
|
|
}
|
|
|
|
stop_dac(s);
|
|
stop_adc(s);
|
|
|
|
if (file->f_mode & FMODE_READ) {
|
|
s->dma_adc.ossfragshift = s->dma_adc.ossmaxfrags =
|
|
s->dma_adc.subdivision = s->dma_adc.total_bytes = 0;
|
|
s->dma_adc.num_channels = 1;
|
|
s->dma_adc.sample_size = 8;
|
|
set_adc_rate(s, 8000);
|
|
if ((minor & 0xf) == SND_DEV_DSP16)
|
|
s->dma_adc.sample_size = 16;
|
|
}
|
|
|
|
if (file->f_mode & FMODE_WRITE) {
|
|
s->dma_dac.ossfragshift = s->dma_dac.ossmaxfrags =
|
|
s->dma_dac.subdivision = s->dma_dac.total_bytes = 0;
|
|
s->dma_dac.num_channels = 1;
|
|
s->dma_dac.sample_size = 8;
|
|
set_dac_rate(s, 8000);
|
|
if ((minor & 0xf) == SND_DEV_DSP16)
|
|
s->dma_dac.sample_size = 16;
|
|
}
|
|
|
|
if (file->f_mode & FMODE_READ) {
|
|
if ((ret = prog_dmabuf_adc(s)))
|
|
return ret;
|
|
}
|
|
if (file->f_mode & FMODE_WRITE) {
|
|
if ((ret = prog_dmabuf_dac(s)))
|
|
return ret;
|
|
}
|
|
|
|
s->open_mode |= file->f_mode & (FMODE_READ | FMODE_WRITE);
|
|
mutex_unlock(&s->open_mutex);
|
|
mutex_init(&s->sem);
|
|
return nonseekable_open(inode, file);
|
|
}
|
|
|
|
static int au1000_release(struct inode *inode, struct file *file)
|
|
{
|
|
struct au1000_state *s = (struct au1000_state *)file->private_data;
|
|
|
|
lock_kernel();
|
|
|
|
if (file->f_mode & FMODE_WRITE) {
|
|
unlock_kernel();
|
|
drain_dac(s, file->f_flags & O_NONBLOCK);
|
|
lock_kernel();
|
|
}
|
|
|
|
mutex_lock(&s->open_mutex);
|
|
if (file->f_mode & FMODE_WRITE) {
|
|
stop_dac(s);
|
|
dealloc_dmabuf(s, &s->dma_dac);
|
|
}
|
|
if (file->f_mode & FMODE_READ) {
|
|
stop_adc(s);
|
|
dealloc_dmabuf(s, &s->dma_adc);
|
|
}
|
|
s->open_mode &= ((~file->f_mode) & (FMODE_READ|FMODE_WRITE));
|
|
mutex_unlock(&s->open_mutex);
|
|
wake_up(&s->open_wait);
|
|
unlock_kernel();
|
|
return 0;
|
|
}
|
|
|
|
static /*const */ struct file_operations au1000_audio_fops = {
|
|
.owner = THIS_MODULE,
|
|
.llseek = au1000_llseek,
|
|
.read = au1000_read,
|
|
.write = au1000_write,
|
|
.poll = au1000_poll,
|
|
.ioctl = au1000_ioctl,
|
|
.mmap = au1000_mmap,
|
|
.open = au1000_open,
|
|
.release = au1000_release,
|
|
};
|
|
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
|
|
/*
|
|
* for debugging purposes, we'll create a proc device that dumps the
|
|
* CODEC chipstate
|
|
*/
|
|
|
|
#ifdef AU1000_DEBUG
|
|
static int proc_au1000_dump(char *buf, char **start, off_t fpos,
|
|
int length, int *eof, void *data)
|
|
{
|
|
struct au1000_state *s = &au1000_state;
|
|
int cnt, len = 0;
|
|
|
|
/* print out header */
|
|
len += sprintf(buf + len, "\n\t\tAU1000 Audio Debug\n\n");
|
|
|
|
// print out digital controller state
|
|
len += sprintf(buf + len, "AU1000 Audio Controller registers\n");
|
|
len += sprintf(buf + len, "---------------------------------\n");
|
|
len += sprintf (buf + len, "AC97C_CONFIG = %08x\n",
|
|
au_readl(AC97C_CONFIG));
|
|
len += sprintf (buf + len, "AC97C_STATUS = %08x\n",
|
|
au_readl(AC97C_STATUS));
|
|
len += sprintf (buf + len, "AC97C_CNTRL = %08x\n",
|
|
au_readl(AC97C_CNTRL));
|
|
|
|
/* print out CODEC state */
|
|
len += sprintf(buf + len, "\nAC97 CODEC registers\n");
|
|
len += sprintf(buf + len, "----------------------\n");
|
|
for (cnt = 0; cnt <= 0x7e; cnt += 2)
|
|
len += sprintf(buf + len, "reg %02x = %04x\n",
|
|
cnt, rdcodec(&s->codec, cnt));
|
|
|
|
if (fpos >= len) {
|
|
*start = buf;
|
|
*eof = 1;
|
|
return 0;
|
|
}
|
|
*start = buf + fpos;
|
|
if ((len -= fpos) > length)
|
|
return length;
|
|
*eof = 1;
|
|
return len;
|
|
|
|
}
|
|
#endif /* AU1000_DEBUG */
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
|
|
MODULE_AUTHOR("Monta Vista Software, stevel@mvista.com");
|
|
MODULE_DESCRIPTION("Au1000 Audio Driver");
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
|
|
static int __devinit au1000_probe(void)
|
|
{
|
|
struct au1000_state *s = &au1000_state;
|
|
int val;
|
|
#ifdef AU1000_DEBUG
|
|
char proc_str[80];
|
|
#endif
|
|
|
|
memset(s, 0, sizeof(struct au1000_state));
|
|
|
|
init_waitqueue_head(&s->dma_adc.wait);
|
|
init_waitqueue_head(&s->dma_dac.wait);
|
|
init_waitqueue_head(&s->open_wait);
|
|
mutex_init(&s->open_mutex);
|
|
spin_lock_init(&s->lock);
|
|
s->codec.private_data = s;
|
|
s->codec.id = 0;
|
|
s->codec.codec_read = rdcodec;
|
|
s->codec.codec_write = wrcodec;
|
|
s->codec.codec_wait = waitcodec;
|
|
|
|
if (!request_mem_region(CPHYSADDR(AC97C_CONFIG),
|
|
0x14, AU1000_MODULE_NAME)) {
|
|
err("AC'97 ports in use");
|
|
return -1;
|
|
}
|
|
// Allocate the DMA Channels
|
|
if ((s->dma_dac.dmanr = request_au1000_dma(DMA_ID_AC97C_TX,
|
|
"audio DAC",
|
|
dac_dma_interrupt,
|
|
IRQF_DISABLED, s)) < 0) {
|
|
err("Can't get DAC DMA");
|
|
goto err_dma1;
|
|
}
|
|
if ((s->dma_adc.dmanr = request_au1000_dma(DMA_ID_AC97C_RX,
|
|
"audio ADC",
|
|
adc_dma_interrupt,
|
|
IRQF_DISABLED, s)) < 0) {
|
|
err("Can't get ADC DMA");
|
|
goto err_dma2;
|
|
}
|
|
|
|
info("DAC: DMA%d/IRQ%d, ADC: DMA%d/IRQ%d",
|
|
s->dma_dac.dmanr, get_dma_done_irq(s->dma_dac.dmanr),
|
|
s->dma_adc.dmanr, get_dma_done_irq(s->dma_adc.dmanr));
|
|
|
|
// enable DMA coherency in read/write DMA channels
|
|
set_dma_mode(s->dma_dac.dmanr,
|
|
get_dma_mode(s->dma_dac.dmanr) & ~DMA_NC);
|
|
set_dma_mode(s->dma_adc.dmanr,
|
|
get_dma_mode(s->dma_adc.dmanr) & ~DMA_NC);
|
|
|
|
/* register devices */
|
|
|
|
if ((s->dev_audio = register_sound_dsp(&au1000_audio_fops, -1)) < 0)
|
|
goto err_dev1;
|
|
if ((s->codec.dev_mixer =
|
|
register_sound_mixer(&au1000_mixer_fops, -1)) < 0)
|
|
goto err_dev2;
|
|
|
|
#ifdef AU1000_DEBUG
|
|
/* intialize the debug proc device */
|
|
s->ps = create_proc_read_entry(AU1000_MODULE_NAME, 0, NULL,
|
|
proc_au1000_dump, NULL);
|
|
#endif /* AU1000_DEBUG */
|
|
|
|
// configure pins for AC'97
|
|
au_writel(au_readl(SYS_PINFUNC) & ~0x02, SYS_PINFUNC);
|
|
|
|
// Assert reset for 10msec to the AC'97 controller, and enable clock
|
|
au_writel(AC97C_RS | AC97C_CE, AC97C_CNTRL);
|
|
au1000_delay(10);
|
|
au_writel(AC97C_CE, AC97C_CNTRL);
|
|
au1000_delay(10); // wait for clock to stabilize
|
|
|
|
/* cold reset the AC'97 */
|
|
au_writel(AC97C_RESET, AC97C_CONFIG);
|
|
au1000_delay(10);
|
|
au_writel(0, AC97C_CONFIG);
|
|
/* need to delay around 500msec(bleech) to give
|
|
some CODECs enough time to wakeup */
|
|
au1000_delay(500);
|
|
|
|
/* warm reset the AC'97 to start the bitclk */
|
|
au_writel(AC97C_SG | AC97C_SYNC, AC97C_CONFIG);
|
|
udelay(100);
|
|
au_writel(0, AC97C_CONFIG);
|
|
|
|
/* codec init */
|
|
if (!ac97_probe_codec(&s->codec))
|
|
goto err_dev3;
|
|
|
|
s->codec_base_caps = rdcodec(&s->codec, AC97_RESET);
|
|
s->codec_ext_caps = rdcodec(&s->codec, AC97_EXTENDED_ID);
|
|
info("AC'97 Base/Extended ID = %04x/%04x",
|
|
s->codec_base_caps, s->codec_ext_caps);
|
|
|
|
/*
|
|
* On the Pb1000, audio playback is on the AUX_OUT
|
|
* channel (which defaults to LNLVL_OUT in AC'97
|
|
* rev 2.2) so make sure this channel is listed
|
|
* as supported (soundcard.h calls this channel
|
|
* ALTPCM). ac97_codec.c does not handle detection
|
|
* of this channel correctly.
|
|
*/
|
|
s->codec.supported_mixers |= SOUND_MASK_ALTPCM;
|
|
/*
|
|
* Now set AUX_OUT's default volume.
|
|
*/
|
|
val = 0x4343;
|
|
mixdev_ioctl(&s->codec, SOUND_MIXER_WRITE_ALTPCM,
|
|
(unsigned long) &val);
|
|
|
|
if (!(s->codec_ext_caps & AC97_EXTID_VRA)) {
|
|
// codec does not support VRA
|
|
s->no_vra = 1;
|
|
} else if (!vra) {
|
|
// Boot option says disable VRA
|
|
u16 ac97_extstat = rdcodec(&s->codec, AC97_EXTENDED_STATUS);
|
|
wrcodec(&s->codec, AC97_EXTENDED_STATUS,
|
|
ac97_extstat & ~AC97_EXTSTAT_VRA);
|
|
s->no_vra = 1;
|
|
}
|
|
if (s->no_vra)
|
|
info("no VRA, interpolating and decimating");
|
|
|
|
/* set mic to be the recording source */
|
|
val = SOUND_MASK_MIC;
|
|
mixdev_ioctl(&s->codec, SOUND_MIXER_WRITE_RECSRC,
|
|
(unsigned long) &val);
|
|
|
|
#ifdef AU1000_DEBUG
|
|
sprintf(proc_str, "driver/%s/%d/ac97", AU1000_MODULE_NAME,
|
|
s->codec.id);
|
|
s->ac97_ps = create_proc_read_entry (proc_str, 0, NULL,
|
|
ac97_read_proc, &s->codec);
|
|
#endif
|
|
|
|
#ifdef CONFIG_MIPS_XXS1500
|
|
/* deassert eapd */
|
|
wrcodec(&s->codec, AC97_POWER_CONTROL,
|
|
rdcodec(&s->codec, AC97_POWER_CONTROL) & ~0x8000);
|
|
/* mute a number of signals which seem to be causing problems
|
|
* if not muted.
|
|
*/
|
|
wrcodec(&s->codec, AC97_PCBEEP_VOL, 0x8000);
|
|
wrcodec(&s->codec, AC97_PHONE_VOL, 0x8008);
|
|
wrcodec(&s->codec, AC97_MIC_VOL, 0x8008);
|
|
wrcodec(&s->codec, AC97_LINEIN_VOL, 0x8808);
|
|
wrcodec(&s->codec, AC97_CD_VOL, 0x8808);
|
|
wrcodec(&s->codec, AC97_VIDEO_VOL, 0x8808);
|
|
wrcodec(&s->codec, AC97_AUX_VOL, 0x8808);
|
|
wrcodec(&s->codec, AC97_PCMOUT_VOL, 0x0808);
|
|
wrcodec(&s->codec, AC97_GENERAL_PURPOSE, 0x2000);
|
|
#endif
|
|
|
|
return 0;
|
|
|
|
err_dev3:
|
|
unregister_sound_mixer(s->codec.dev_mixer);
|
|
err_dev2:
|
|
unregister_sound_dsp(s->dev_audio);
|
|
err_dev1:
|
|
free_au1000_dma(s->dma_adc.dmanr);
|
|
err_dma2:
|
|
free_au1000_dma(s->dma_dac.dmanr);
|
|
err_dma1:
|
|
release_mem_region(CPHYSADDR(AC97C_CONFIG), 0x14);
|
|
return -1;
|
|
}
|
|
|
|
static void au1000_remove(void)
|
|
{
|
|
struct au1000_state *s = &au1000_state;
|
|
|
|
if (!s)
|
|
return;
|
|
#ifdef AU1000_DEBUG
|
|
if (s->ps)
|
|
remove_proc_entry(AU1000_MODULE_NAME, NULL);
|
|
#endif /* AU1000_DEBUG */
|
|
synchronize_irq();
|
|
free_au1000_dma(s->dma_adc.dmanr);
|
|
free_au1000_dma(s->dma_dac.dmanr);
|
|
release_mem_region(CPHYSADDR(AC97C_CONFIG), 0x14);
|
|
unregister_sound_dsp(s->dev_audio);
|
|
unregister_sound_mixer(s->codec.dev_mixer);
|
|
}
|
|
|
|
static int __init init_au1000(void)
|
|
{
|
|
info("stevel@mvista.com, built " __TIME__ " on " __DATE__);
|
|
return au1000_probe();
|
|
}
|
|
|
|
static void __exit cleanup_au1000(void)
|
|
{
|
|
info("unloading");
|
|
au1000_remove();
|
|
}
|
|
|
|
module_init(init_au1000);
|
|
module_exit(cleanup_au1000);
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
|
|
#ifndef MODULE
|
|
|
|
static int __init au1000_setup(char *options)
|
|
{
|
|
char *this_opt;
|
|
|
|
if (!options || !*options)
|
|
return 0;
|
|
|
|
while ((this_opt = strsep(&options, ","))) {
|
|
if (!*this_opt)
|
|
continue;
|
|
if (!strncmp(this_opt, "vra", 3)) {
|
|
vra = 1;
|
|
}
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
__setup("au1000_audio=", au1000_setup);
|
|
|
|
#endif /* MODULE */
|